[#bsl-basic_istringstream-2constructor-01]
= xref:bsl.adoc[bsl]::xref:bsl/basic_istringstream.adoc[basic_istringstream]::basic_istringstream
:relfileprefix: ../../
:mrdocs:

Create a `basic_istringstream` object. Use the specified `initialString` indicating the initial sequence of characters from which input will be streamed. Optionally specify a `modeBitMask` indicating whether the underlying stream‐buffer may also be written to (`rdbuf` is created using `modeBitMask | ios_base::in`). If `modeBitMask` is not supplied, `rdbuf` will be created using `ios_base::in`. Optionally specify the `allocator` used to supply memory. If `allocator` is not supplied, the allocator in `initialString` is used. `initialString` is left in a valid but unspecified state.

== Synopsis

Declared in `<bslstl_istringstream.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
basic_istringstream(xref:BloombergLP/bslmf/MovableRef.adoc[BloombergLP::bslmf::MovableRef<StringType>] initialString);
----


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